7015221 has 8 divisors (see below), whose sum is σ = 10392960. Its totient is φ = 4676796.

The previous prime is 7015213. The next prime is 7015259. The reversal of 7015221 is 1225107.

7015221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7015221 - 2³ = 7015213 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7015194 and 7015203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7015721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129885 + ... + 129938.

It is an arithmetic number, because the mean of its divisors is an integer number (1299120).

Almost surely, 2^7015221 is an apocalyptic number.

It is an amenable number.

7015221 is a deficient number, since it is larger than the sum of its proper divisors (3377739).

7015221 is a wasteful number, since it uses less digits than its factorization.

7015221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259832 (or 259826 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 7015221 is about 2648.6262476990. The cubic root of 7015221 is about 191.4316689768.

The spelling of 7015221 in words is "seven million, fifteen thousand, two hundred twenty-one".